5581491570 has 96 divisors (see below), whose sum is σ = 14990382720. Its totient is φ = 1477828800.

The previous prime is 5581491569. The next prime is 5581491571. The reversal of 5581491570 is 751941855.

5581491570 is a `hidden beast` number, since 558 + 1 + 4 + 91 + 5 + 7 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (5581491569) and next prime (5581491571).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5581491571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8845155 + ... + 8845785.

It is an arithmetic number, because the mean of its divisors is an integer number (156149820).

Almost surely, 2^5581491570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5581491570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7495191360).

5581491570 is an abundant number, since it is smaller than the sum of its proper divisors (9408891150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5581491570 is a wasteful number, since it uses less digits than its factorization.

5581491570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 45.

The square root of 5581491570 is about 74709.3807362904. The cubic root of 5581491570 is about 1773.8494502388.

It can be divided in two parts, 558 and 1491570, that added together give a triangular number (1492128 = T₁₇₂₇).

The spelling of 5581491570 in words is "five billion, five hundred eighty-one million, four hundred ninety-one thousand, five hundred seventy".